Gas engine



Aug. 6; 1929. J NEWMANN 7 1,723,065

GAS ENGINE Original Filed June 1921 2 Sheets-Sheet 1 INVENTOR John /Ve wmann BY M AITORNEWI A g- 6, 1929- J. NEWMANN 1,723,065

GAS ENGINE Original Filed June 50. 1 1 2 Sheets-Sheet 2 INVENTOR John A/ewman/Z v BY W) W ATTORNEYS Patented Aug. 6, 1929 UNITED STATES JOHN 'gunwuanu, or GLENDALE, NEW roan one ENGINE.

Driginal application fil ed June 30, 1921, Serial No. 481,499. Divided and this application filed May 12,

1925. Serial no. 29, 77.

This invention relates to internal combustion motors and more particularly to improvements in the construction" and operation thereof with a View of generally 1mproving thectficiency of this class of engines.

Especially this invention relates to an improved mechanism for driving the exhaust and intake valves and for driving a force feed oil pump, and this application is adivision of my former application Serial Number 481,499 filed June 30, 1921,

An object is to produce an internal combustion motor comprising a combination of new features which makes this engine highly adaptable for aeronautical and automotive purposes and particularly an obJect is to produce novel eflicient combination force feed pumping and valve driving means.

Furthermore it is the object to produce an improved engine of the radial cylinder type having a plurality of cylinders grouped principle and an embodiment of my invention, and though I have illustrated and described a preferred form of engine construction and operation, I claim a right of protection asto all such changes as ohviously come within the scope ormy invention.

Figure 1 shows my engine assembly in sectional view to illustrate my invention in the valve drive and pump combination.

Figure 2 shows a sectional fragmentary view taken on the line 22 of Figure l to show an eccentric drive tor'the valve and pump combination.

rality Renewed June 9, 1928.

cylinders 10 radially mounted on a crank case 11. A piston 12 is confined in each cyhnder and is attached to a connecting rod 13 which is journaled onthe crank 22 of the engine crank shaft 20 and the crank carries counterweightsZ l and 25.

A valve plate seat 34 is anchored in the top of each cylinder head, and has a plu or radially arranged intake ports 35 and exhaust ports 36 made therein The ports 35 and 36 are periodically opened and closed to properly time the flow of fuel gas into thecylinder 10 and discharge the ex- .haust and burnt gas therefrom; The inner face of the valve seat 34 is preferably made plane or fiat, and a disc valve 73 rotates in close contact with the inner plane face of the valve plate to regulate the opening and closing or" the aforesaid intake and exhaust ports.

A cover sleeve, wall 42 integrally formed with a head 43, is disposedover the valve seat 84. The head 43 of this cover sleeve is provided with a number of radial ribs 44 employed to radiate the heat and facilitate the cooling of the lcylizider head.

The disc valve 73 is rotated against the inner face of the valve seat 34. to open and close the intake and exhaust ports 35 and 36. The valve 73 is anchored to a valve shaft ta mounted in a bushing set in the valve head, parts. A gear ?'5 is fixed to the unper end of the valve shaft 74- and driven as described. The valve '73 is madewith radial slits or openings 76 which periodically pass over the intake ports 35 and exhaust ports 86 of the valve seat 34 to open and close said ports. The openings 76 made in the valve 73 correspond in number to the number of intake ports 35 and likewise correspond in number to the number of discharge ports 76 so that all the intake ports or exhaust ports are quickly opened to provide a very large intake passage or discharge passage to n and from the cylinder. A cover 7 Z is parrorated to admit air and fits over the cylinder I head to enclose the gear and cylinder head An eccentric '79 is fixed on the crank shaft; and agear 80 in the form of an eccentric strap is confined on the eccentric with hearings disposed therebetween. The gear 80 is provided with improved oval or rounded teeth made on the periphery thereon An comprising a cylindrical its other gear 82 with internal teeth conforming to the contour of the teeth of the eccen- 8O'to reciprocate the piston in the cylinder .94 under .the action of the eccentric 79.

trically driven gear 80 and meshing therewith, is journalled on a hub 83 made on the side wall of the crank case. The gear 82 is made with bevelled gear teeth on the periphery thereof which engages a drive pinion 84 which is journalled in a bearing carried on the side wall of the crank case. A drive shaft 85 is fixed to the drive pinion 84 and has a drive pinion 86 made on the upper end thereof to engage the gear 7 5 to revolve the valve 73 inside the cylinder. The drive shaft 85' is provided with a universal joint 87 to accommodate the angular operation of the shaft 85.

A pump housing 90 is carried on the engine above the eccentrically driven gear 80 and supports a journal stud pin 91. The journal 91 is made with oil passages 92 and oil pipes 93 connect with the passages for the purpose of admitting oil through the journal pin 91 to a pump as well as for conveying the oil therefrom under pressure to be distributed to various parts of the engine through pipes not shown. A pump cylinder 94 is suspended onthe journal pin 91 and is fitted with a piston 95. A. piston rod 81' is anchored to the piston 95 and is preferably integral with the eccentric strap gear In the operation of the engine, the crank shaft rotates under the power impulses of the plurality of pistons which produce the motive force delivered from :the crank shaft of the radial motor. The crank shaft is shown broken away on the front side of the engine, but it is understood that it is extended to receive the'prop'cllerhub of an air screw or clutch member of an automobile, such parts not-being shown.

' eccentrically driven gear 80. Asthe eccentric rotates the gear 80 which is-held against rotation bythe piston rod 81 follows. an orbital path around the crank shaft. The teeth on the periphery of the gear 80 are thereby brought into intermittentcontact with the internal teeth of the gear 82, and by this action the large bevel gear 82 is driven to opcrate the valve 73.

Blank tooth spaces I 100 are, preferably made on the lower andupper part of the periphery of the gear 80 because these teeth are not in fact required due to the action of the eccentric thereby causing the blank space 100 of the gear 80 to slip across the gear 82 and thus cause acontinuous motion of the gear 82. When the eccentric reaches its lowest or uppermost point of travel the blank toothless spaces do not interfere with continuous rotary motion because the two gears'are always in mesh. The teeth on one I side of the blank spaces 100 always mesh before the teeth on the other side move out of mesh. Rotation of the eccentric 79 imparts a quick accelerated and retarded motion to the valves, which is similar to the movement of the pistons in the cylinders to the same way as the eccentric goes up its action is to continue the rotation of gear 82. It will be observed that the gear 82 performs the double function of driving the force feed oil pump 94 and-the valve 73 as well and that the structure is simple, compact and light in weight. My improved construction is such. that a high speed engine has its valve mechanism operated by comparatively slow speed operating means for it is observed that the gear 82 rotates at relatively slow speed and this arrangement serves to reduce friction and wear.

What Iclaim is:

1. An'engine and combined oil pump and valve driving mechanism therefor, comprising a journal pin, a pump cylinder suspended on said journal pin and adapted to oscillate, a piston in the cylinder, a connecting rod secured to the piston, an eccentric driven by the engine, an eccentric strap made on the connecting rod and confined on the eccentric, and a gear made on the connecting rod eccentric strap and being concentric with the aforesaid eccentric to operate the engine valve gear.

2. A combination oil pump and valve driving mechanism for engines comprising an engine cylinder and crank shaft assembly, a valve-for governing the intake and discharge of gas to and from the cylinder, an oil pump cylinder supported in such a manner as to oscillate, an eccentric on the engine crank shaft, a piston and crank connecting rod working in the oil pump cylinder and operated by the eccentric, a drive gear made on the crank connecting rod and adapted to be moved in an orbital path by the eccentric, and a gear meshing with and rotated by the drive gear and adapted to rotate the aforesaid valve.

3. An engine comprising a. crank case, a cylinder and crank shaft assembly, a rotatable valve in the cylinder, a gear mounted on the cylinder head to rotate the valve, a valve shaft disposed alongside the cylinder, a pinion on the upper end of the shaft meshing with the valve drive gear,.a gear attached to the inner end of the shaft, a driven ear journaled on the crank case and mesh= mg with the last named gear, said last named gear having internal gear teeth, an oil pump, and means adapted to drive the pump from the internal gear teeth.

4. A valve or pump drlve. mechanism for gas engines comprising in combination, a crank shaft, an eccentric fixed thereon, a rotating gear by which the valves of the engine are operated, a non-rotating gear journaled on the eccentric and meshing with the first gear, and blank tooth spaces made on one of the gears adapting one of the gears to slip across the teeth of the other gear when the eccentric is in its upper and lower position.

5. An engine comprising in combination,

a crank case, a cylinder and crank shaftas-.

- sembly, a valve seat in the cylinder, a rotat able valve in the cylinder working against the seat, a gear mounted on the cylinder head to rotate the valve, a valve shaft disposed alongside" the cylinder, a pinion on the outer end of the shaft meshing with the valvedrive gear, a gear fixed on the inner end of the shaft, a driven gear journaled on the crank case and meshing with the last named gear to drive the valve shaft, an oil force feed pump, and drive means operating the pump and therefrom the aforesaid gear journaled on the crank case.

6. An engine comprising a crank case, a cylinder and crank shaft assembly, an oil pump cylinder, a piston in the cylinder, a connecting rodanchored to the piston, an eccentric strap carried on the connecting rod, gear teeth made onthe external portion of the eccentric strap thereby providing a non-rotatable gear, a gear journaled on crank case, means operating between the eccentric strap and last named gear to drive said last named gear, and a valve in the cylinder adapted to be driven from last named ear. 7 I g In testimony whereof I afiix my signature.

JOHN NEWMANN. 

